Prader-Willi vs. Angelman Syndrome (Imprinting)

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[@themesaregreat]

Everytime i learn about imprinting i completely forget it two weeks later

[@xKiB5]

lmao so true omg

[@junaidmushtaq9421]

Easy topic ,

[@thebeets6055]

That is incredibly accurate

[@Dr_Shin]

Clarification that you HAVE TO KNOW In Prader-Willis, Know that the maternal copy of this gene in chromosome 15 involved here is what is NORMALLY imprinted (Inactive) by methylation. ONLY the paternal copy of the this gene is active/utilized NORMALLY. Thus, there can be 3 different causes of Prader-Willis: 1) Loss of the paternal copy of the gene 2) Uniparental maternal disomy (Either Hetero or Iso) because now both of the genes will be imprinted/inactive 3) Translocation that replaces the needed segment of the paternal gene in ch 15 with a different gene. In Angelman, Same mechanism as Prader-Willis. Just opposite. Paternal copy is NORMALLY imprinted. Loss of maternal copy of the gene will lead to this disease.

[@themicahg0928]

Thank you!!

[@arturomauriciobautistaroma5694]

I'm agree

[@skull_bonet1]

Watching this an hour before exam. You never know how you're changing the world 🥰

[@vanshajchandra307]

In Chandler Bing’s voice “could it beeee any simpler?” Great video

[@SamAmiri]

A super quick recap for the exam: Prader-Willis: 1. Mum side inactive. 2. Father side is missing/defective. Angelman: 1. Mum's side is missing/defective. 2. Dad's side is inactive. mnemonic: PIMAMI or PIDADI P = Prader I = Inactive M = missing/defective A = Angelman M = Missing/defective I = Inactive Prader-Willis Special Case: 1. Uniparental maternal disomy = causing both genes to be imprinted/inactive. 2. Translocation = replaces segment of the paternal gene in ch 15 with a different gene.

[@cesaraugustoruiz]

Very helpful, thanks

[@xKiB5]

great work, keep it up!! I love this

[@nastiianastiia5763]

Thank You for Your great work

[@Kcebab12345]

prader vader made me crack up pretty good lol

[@keshvichauhan6804]

you are too good, thank you

[@lee-annechazanga7017]

Just made the clinicals easier, thanks!

[@stephanevers3430]

more vids bro!! youre a big help

[@StoicScape219]

Thank you for this :) Getting ready for my pediatrics exam next week

[@kaath08]

LOVED IT! thnx... greetings from MEXICO

[@wehatedisneystars]

GOD BLESS YOU!!!!!!!!

[@yasminyouyuo]

perfect thank you

[@drj2590]

superb very short and productive

[@xaaboopinkly]

Thanks sir! ❤️

[@sahilbansari5385]

Dirty we need more videos on genetics please upload as soon as possible.!!!

[@amitanandda]

Awesome video you can also remember chromosome no from their name As both names have a and e in them and a is the 1st letter so 1 and e is the 5 th letter so 5 combine them together and u get chromosome 15

[@samik3184]

angel-man (a is the 1st letter but e is the 4th letter bro)

[@CXY96]

@@samik3184 ABCDE, check your alphabet bro

[@Na-hh5yo]

thank you soooo muc forthis

[@CurlyHeadMed]

Thanks for this. Btw, have some of your videos been deleted? I feel like you had way more videos a month ago. For example, my favorite video on enzyme kinetics (with Km for cock and Vmax for vagina) is missing.

[@komaddog]

Dirty little mind lol

[@srinivasaraosirasapalli5104]

nice explanation

[@bacaworld7095]

Thank you

[@ast1848]

Can you please make a vid on ABO blood typing and rhesus system? confusing af

[@mmafan4701]

Very easy to way deliver nice concepts ❤

[@deliamariacoman214]

Could you explain why the deletion in the father's chromosome causes another syndrome than the deletion in the mother's chromosome?

[@JasonVaysberg]

Apparently Beckwith-Wiedemann Syndrome can also be an imprinting disorder, in case this comes up.

[@dr.mohammedbasheer8672]

Thanks a lot this is really helpful ^_^

[@noornoor-yv8tu]

Thank u.

[@johnspikesii4223]

Absent mommy's llttle angel; Darth Prader seeks his missing father (i know it isn't canon, but it works)

[@dennybreese]

Thanks!

[@RohitPant04]

Darth Vader Willi looks like Peter Griffin wearing a Darth Vader costume for Halloween! 😳

[@Mrhamster114]

God bless you, Dirty

[@smol_chilli_pepper]

How do they determine which chromosome came from which parent? Doesn't both autosomal chromatids look exactly the same? So when they were determining the causes of Angelman's and Prader-Villi how did they know that it was the maternal or paternal chromosome that had the deletion?

[@AiLuvROCK]

They don't look exactly the same because of the parent-of-origin-specific imprinting. I think that's how they found out.

[@smol_chilli_pepper]

@@AiLuvROCK hey thanks for answering. when you say "they don't look the same" are you referring to the autosomal chromotids? because that's what I mean. Do chromotids from a specific parent look a particular way or have hallmark genes? How in a laboratory setting did they realise that it was the mutation on the maternal strand that caused Angelman's when the chromotids essentially look the same?

[@AiLuvROCK]

@@smol_chilli_pepper Np. So yes, the chromosome from the mother looks different than from the father because they are imprinted in a different way. This means that some parts are inactivated by DNA methylation. So in the case of Angelman syndrome, a part of maternal chromosome 15 is lost, either by deletion or by inheritance of 2 paternal chromosomes. On the paternal chromosome this part is imprinted (=methylated). So you have no expression of this part of the gene. Does this help?

[@eee4048]

X is paternal and y is maternal

[@iamthevengeance4766]

@@AiLuvROCK in angelmann is paternal or maternal is imprinted

[@saadmaqsood9804]

and he has a small willi hypogonaldism

[@niky9731]

Im literally having the HARDEST time trying to determine a paternally imprinted pedigree from a maternally imprinted pedigree

[@nanais007]

Well this is a cool video. My son FMFX and I assume he has a subtype of PWS.

[@yes3072]

So how many total of chromosomes and autosomes does angelMan and Prader-Willi have??

[@drikaprezoto628]

MAterNal forms the word MAN, in AngelMAN 😊

[@Sponge247]

cant see his willi

[@prakashrana1404]

🤣😂

[@Be1smaht]

Which is imprinted vs. Methylated

[@AG-en5y]

❤❤❤

[@3rdeyeshine94]

Genomic imprinting an Gene changing through psychedelics

[@fatemehkf5066]

Prader willi causes because of maternal copy is turned off.

[@ashumedico12]

can u please video on milestones in pediatrics

[@DirtyMedicine]

we already have one

[@sandrarobbin3019]

WHERE THE HECK IS ALL YOUR VIDEOS AND YOUR FACEBOOK PAGE???????????????????????????????????

[@user-yi7vq5sk6y]

Alguien que hable español castellano

[@kayallen7603]

and nothing can be done, right? Sad. Poor kids.

[@alpkaandabanloglu5669]

Vader wili omg 🤣

[@Be1smaht]

Sorry dirty this one wasnt good. Everything imprinted is not methylated. There is disomy too.

[@Dr_Shin]

Imprinting by definition is methylation. Of course there are exceptions, but it is true in these two diseases. He did not clarify the imprinting & mechanism of these two diseases very well, but nothing he said was inaccurate. In PW, Maternal copy of the gene is imprinted NORMALLY, and that is why loss of paternal gene causes this disease. In Angelman, Paternal copy of the gene is imprinted NORMALLY, and the loss of maternal gene causes the disease. For example, these are the 3 different mechanisms that can cause loss of paternal gene and cause PW. 1) Loss of function mutation of the paternal copy (~70%) 2) Uniparental maternal disomy (~25%) 3) Translocation of the needed segment of the paternal gene with a different gene. So in a strict sense, Imprinting is the more important factor in these diseases. Disomy is just one of the various mechanisms that can cause these diseases.